Doorlock



G. JERLING July 23 1935.;v

DOORLOCK Filed Aug. 29, 1951 2 Sheets-Sheet 2 Patented July 2, 1935 ."DOROCK e v Gttfriea uerli'ng. vohieag',im.; @giganti-10nefhalf v to Frederiek sn. j f imitation Augusta,

` reclaim.

.,rjThe `irlllentiori relates jtoLdoor-locks of the typein Which'the'latch orlockingbolt is adapted to be operatedbyfthe doorknobsorhandles and which can .be set sogthe bolt` cannot beun- ;.5 locked by the` outside handle or, knob. Y A

, .-One object of the invention is to provide a fnew fandimprovedlockzof this type in which the locking bolt may be controlled by manipulation rofthe insidehandle soit cannot r-be unlocked frornuthe outside. y l y A. y y y Another object is to provide a lock of this type in which the bolt=releasing device, controlled by the vinside knob-,caribe operated by akey'gnsert- .able-inltheroutside knob. Anotherpbject ofthe invention -gisto provide lv-ajlock of this character 'whichis simplein'construction land* efficient in 1 operation.. f Other objects ofthe invention will be apparent from thefdescription ofthe invention. LvThe invention consistsin the several novel-[features ,hereinafter set forth-Land more-particularly :deiinedfby Claims "at, thefCnG1uSi0n-:here0f- 1 A lIn thedrawings:f Fig.l lis a -section'takenlongitudinally of the locking 130,011:- ofa lock embodying theinventm the` Operating mechanism for the locljzingjboltbeingy shown inpositionjto perrnitthe bolt., to beretracted,byv either-thefinside or outside handle? Fig.w2i s a similarvilewfshow- ,Iingithe boltzlocked against releaseby the outside handle.I Eigaisanaxial section -oflthe..look, Qpartsbeing shown ingelevatiod* Fig`r i is ajsection taken Online 4,.-4 of Fig.`1.l.gFig .-`5is a perspective 0f', the making bolt and the yokecon.-

nsts thereto-V. Fia 16 a Sectionon line, :1E-6 Qfgi, Fia 711s a'SeCtiQnOnline ,1-1 ofFig. '4V.` Eig. Slis a detailof theykey foi;` releasing the Vblocking,.I oolt'.. Fig.. 9 is-a detail of the -stem for .fthe insidehandle.; Fig. isf'adetail.of;the stem the outside handle. .Fig 1l is a perspective 'of the` keycontrolled rod forv releasingthe `bolt sor it canfbe retracted from the outside of the f [door yThe invention iskexempllified in a lofjzkywhich` is k 'applied to a door 'landfcomprisesJa knob. ;or `4handle .l Ion theinsideandvknobhor handleA l2 y on they outside of ,thev door, and a sldablelocking .i 0r' ltchzbolt lf3.. which vis guided, in a plate i4 set into" the edge of the door. The bolt I3 has asterni which is screw-threaded into the stem mechanism hereinafter described, to Withdraw -thelbolt from the socketin the doorframe and ,'toflo'ck'it against retraction. This yokeiandthe nichanism vfor operating it from the door-handles aresentaitfied in a'casing Whichvcornprises :a cyliningextending through the door, an outsideendsecure theplatesA 20, l; andv the lshell I v together.V

A stem 23 is `journalled in end-plate 2| and .5'

securedby a screw Ila to the inside'handle il. vv,A stem 24,V coaxial jyvith stem 23, is removably is journalled inplate e! vandvis extended into and journalled infa. socket 26 inthe innerendlofA the f'stern123onjthe inside handle. These stems are independentlyrotatable. Q

V"'Solfzefll straddles the stems 2 3 and, 'andits stem ILS is-'slidable through the shell i8. y A coil spring 2l around said stem vI6' and the stem I5 of the lokingb'oltel3-engages awasher 28 and a plate' 29 4with angular ends V30 engaging thevplate '|4 in Which the bolt Iv3gisslidablef This spring holds the bolt normally -projected or Lin doorlocking fposi'tion, and vpermits the'bolt to .be-retracted by lthe operating 1nechanirsm, andrestcres'th'eboltr I37to its locking position. Washer secured 4by a screw `25to the outside handle l2,

ifs

I28I is adapted'to seat onthe outside of shell L8 the `vbolt `is'A unlocked or operablejby the handles and is adapted to be shifted away from the .shell by a shoulder .Iva on the yokestern lr6` inaiftr set` forth.

Ill',v as "shown ,in Eig. '1. single arm'33 -is integral or rigid'with the stem23 Aofthe inside handie andextendsv; through a-notch or slot #34' inthe sfide of the `yokegWhich projects `inwardly -from theyokestem,l Theface 33%L of arm 33isadapt ed, whenit is rotated by the inside handle in one direction f(clockwise), t'ovengage the` endgMFl` of v`notch 34 and` tofretractithe bolt I3 ragainst the 'itsrj-lower face which is adapted to engage the edge 34]@ ofl notch inthe yoke to shift the yoke outwardly aeslight or vsufficient distance to permit the arm `33 topass into the central portionl Hb -of` the yoke, as shoWnjinlig-.f-2. ,In-suchfposition, A the'force of spring 21 -Will be applied against arm 33.- armisthen in itsv deadfcenterposition, andvvill lock-the boltvI-3 and yoke Il against re- `vtraction` by the out-side handle I2 yand-arms3l` .Which-arerotatable thereby. There is sufficient 1' clearance between arms 3l and abutments 32 on the yoke, when the yoke is in its normal or un locked position, to permit the slight inward movement of the yoke which is necessary for the arm 33 on the inside handle to swing the yoke into its locked position. When the cam face 33b pushes the yoke I1 outwardly as the arm 33 passes into the yoke, the shoulder I6a will engage the washer 28 and unseat the latterfrom the shell I8,` so that the yoke will bepressed against the outer end of arm 33 while the arm remains in position to lock the bolt I3. When the bolt I3 is released, arm 33 will be in the position shown in Fig. l. By turning the inside handle IIclockwise, the face 33SL of arm, 33.Wi1 l engage the edge 34a of the yoke and retract thezbolt I3 against the force of spring `21. While the arm 33 is in the position shown in' Fig. l', the yoke l1 will be free to be operated by the farms 3| from the outside handle I 2 when the latter is rotated in either direction. In consequence the bolt I3 can be retracted'by the turning of the outside handle in either direction, or by turning of the inside handle in one direction. Iri-turning the inside handle counter-clockwise, arm 33V will be shifted-into the yoke as shown in Fig. 2,'so the Vyoke will be locked against retraction by arms 43I and the outsidehandle, while at `they same time the bolt I3 can be retracted by clockwise rotation of the 'inside handle. YThe springl21, acting on washer 28, which engages shell I8, yieldingly holds lthe yoke so that the abutment 34bfwill intercept the arm 33V and prevent the arm from dropping into the yoke and thus locking the bolt I3. When force is applied to the inside handle, the cam face 33b will force the yoke outwardlyagainst the force of the spring 21, so that the arm 33, when it has passed into the yoke will befrictionally held therein.' At that time, washer 28 will be unseated from-shell I8. This construction makes it possible toshift the bolt I3 to an abnormal position when the arm 33 is operated to lock the bolt, causes thev yoke to be pressed against the arm33- when the latter is in bolt-locking position, and yieldingly holds the yoke sothe arm 33 will not drop` into the yoke, unless forcel is appliedv to the inside handle for that purpose. This exemplifies aA door-lock in -Which the locking bolt mayfby manipulation of the inside handle, be secured against retraction by the outside handle, so that a separate device `for this purpose can bedispensed with.

A key operable lock is mounted `in the outer handle for controllingthe operation of arm 33 to release the bolt I3. This lock comprises a casing 35 which is secured by screws 36 inthe outside handle I2; Y a stem 31 slidably'mounted in the stem24 of theouter handle; and a lug or arm 31a which is rigid with the inner'end of stem 31 is adapted to pass into'a notch 38 in theinner end of the stem 23 of the Vinside handle `II when the stem 31 is pushed inwardly. When the lug 31a has entered the notch 38, the stem 23 of the inside handle Will be rotatable by the stem 31 of the outside handle, to swing the arm 33 out of its locking position in yoke I1 and torelease the locking bolt I3. A` head 31b'on the outer end of stem 31 is slidably mounted inthe casing 35. This head is bifurcated to receive a flat key 40, and has notches 4I to receive plate tumblers 42 which are carried by the casing and are normallypressed into said notches by springs 43 to lock the stem'31 against axial movement. Theinnerend of key 40 is tapered to spread the tumblers to clear the `head 31b forwaxial 'by the spring-pressed tumblers 42.

movement. The key is adapted to enter the bifurcated part of the head 31h and to abut against the cross wall of said part so that upon inward shift thereof it will move the stem 31 to bring lug 31a into the notch 38 of the stem 23 on the inside handle and so that when the key is turned, stem 31 and lug 31a will rotate stern 23 and swing the outer end of arm 33 out of the yoke I1 and release. the bolt I3 so it cany be retracted by the` outer handle I2 and arms 3|. A coil spring 44, between stem 24 and head 31, holds the stem 31 in, and retracts it to, its normal position where it will be locked against axial movement Lugs 45, in the casing 35, are adapted to register with notches v46 in the key 40 only when the latter has been pushed to its inner position, and so that the stem 34 lcan be rotated only by a proper key. This exemplies a key-controlled lock for releasing the locking bolt from the outside of the door after the locking bolt haa-by the-manipulation of the inside handle, been secured to prevent it from being retractedby the outside handle.

' The invention is not to be understood as restricted to the details set forth, since these may be modified within the scope ofthe appended claims,r Without departing from the spirit and scope of the invention. 4 f

Having thus' described the invention, what I claim as new and desire to secure' by Letters Patent, is: f Y

. 1. In a door lock of the character described, the combination of inside andoutside, rotatable handles, a stem secured to and extending inwardly from the inside handle provided at its inner end with'a notch, astem secured to and extending inwardly from the outside handle positioned in coaxial relation with respect to the stem of the inside handle; a slidable locking` bolt, a yoke on the'bolt, means on the stem of the outside handle for shifting the yoke to release the bolt when rthe outside handley is rotated in either direction,lan arm on the stem of the inside handle arranged to shift the yoke for bolt- -to the lock' so that it is slid inwardly Vin response to unlocking of the lock by the key and having at the inner end'thereof a member arranged to lbeY shifted into the `notch upon inward shift of the element and to form an interlocking connection whereby the arm may be shifted from the outside out` of locked relation with the yoken Order to" release the llocking bolt so `thatit is operable by the outside handle.

2. In a door 'lock of the character described,

the combination of inside and outside rotatable handles, a stem connected to and extending nwardly from the inside handle and having a central, open-ended socket in its inner end and a notch leading outwardly from the socket, a

Stem secured to and extending inwardly from the outside handle and having a longitudinally extending,- radial groove and its inner end iitting rotatably in the aforesaid socket, a slidablelocking boltya yoke on the bolt, means on the'stem e 2,006,457 of the outside handle for shifting the yoke tok release the bolt when the outside handle is rotated in either direction,van arm on the stem of the inside handle arranged to shift the yoke for bolt-unlocking purposes when the handle is rotated in one direction,and operable when said inside handle is rotated in the opposite direction to lock Ithe yoke so that the bolt cannot be re(- l eased by operation of the outside handle, a

{key-operable lock mounted in the outside handle,

a'nd a stem-element mounted in the groove in the stem of the outside handle for longitudinal sliding movement, connected to the lock so that it lock by the key therefor and provided atits inner end with a. laterally extending lug arranged to be shiftedinto the `notch in the inner end of the stem of the inside handle in response to unlooking ofthe lock and inwardshift of the stemelement, and serving when in the notch to form an interlocking connection between the twoy handle stelns whereby the aforesaid arm may be shifted from the'outside of the door out of locked relation with the yoke in response to release of the locking bolt so that .it is operable by the outside handle. v

GOTTFRIED JERLING. 

